From 33db5c037b8f71858e03f585af059982178c8c86 Mon Sep 17 00:00:00 2001 From: "Johan B. C. Engelen" Date: Fri, 24 Nov 2006 21:17:33 +0000 Subject: NEW: radiobuttons for extensions. See radiobutton_example.inx how to use them (they are very similar to enums) (bzr r2031) --- src/extension/paramradiobutton.cpp | 232 +++++++++++++++++++++++++++++++++++++ 1 file changed, 232 insertions(+) create mode 100644 src/extension/paramradiobutton.cpp (limited to 'src/extension/paramradiobutton.cpp') diff --git a/src/extension/paramradiobutton.cpp b/src/extension/paramradiobutton.cpp new file mode 100644 index 000000000..80ec50521 --- /dev/null +++ b/src/extension/paramradiobutton.cpp @@ -0,0 +1,232 @@ +/** \file + * extension parameter for radiobuttons. + * + * It uses a Gtk:ComboBoxText widget in the extension UI. + */ + +/* + * Author: + * Johan Engelen + * + * Copyright (C) 2006 Author + * + * Released under GNU GPL, read the file 'COPYING' for more information + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + + +#include +#include +#include +#include +#include + +#include + +#include + +#include "extension.h" +#include "prefs-utils.h" +#include "document-private.h" +#include "sp-object.h" + +#include "paramradiobutton.h" + +/** \brief The root directory in the preferences database for extension + related parameters. */ +#define PREF_DIR "extensions" + +namespace Inkscape { +namespace Extension { + +ParamRadioButton::ParamRadioButton (const gchar * name, const gchar * guitext, const gchar * desc, const Parameter::_scope_t scope, Inkscape::Extension::Extension * ext, Inkscape::XML::Node * xml) : + Parameter(name, guitext, desc, scope, ext) +{ + choices = NULL; + _value = NULL; + + // Read XML tree to add enumeration items: + // printf("Extension Constructor: "); + if (xml != NULL) { + Inkscape::XML::Node *child_repr = sp_repr_children(xml); + while (child_repr != NULL) { + char const * chname = child_repr->name(); + if (!strcmp(chname, "item")) { + Glib::ustring * newitem = NULL; + const char * contents = sp_repr_children(child_repr)->content(); + if (contents != NULL) + newitem = new Glib::ustring(contents); + if (newitem != NULL) choices = g_slist_append(choices, newitem); + } + child_repr = sp_repr_next(child_repr); + } + } + + // Initialize _value with the default value from xml + // for simplicity : default to the contents of the first xml-child + const char * defaultval = NULL; + if (sp_repr_children(sp_repr_children(xml)) != NULL) + defaultval = sp_repr_children(sp_repr_children(xml))->content(); + + gchar * pref_name = this->pref_name(); + const gchar * paramval = prefs_get_string_attribute(PREF_DIR, pref_name); + g_free(pref_name); + + if (paramval != NULL) + defaultval = paramval; + if (defaultval != NULL) + _value = g_strdup(defaultval); // allocate space for _value + + return; +} + +ParamRadioButton::~ParamRadioButton (void) +{ + //destroy choice strings + for (GSList * list = choices; list != NULL; list = g_slist_next(list)) { + Glib::ustring * text = reinterpret_cast(list->data); + delete text; + } + g_slist_free(choices); + + g_free(_value); +} + + +/** \brief A function to set the \c _value + \param in The value to set + \param doc A document that should be used to set the value. + \param node The node where the value may be placed + + This function sets ONLY the internal value, but it also sets the value + in the preferences structure. To put it in the right place, \c PREF_DIR + and \c pref_name() are used. + + To copy the data into _value the old memory must be free'd first. + It is important to note that \c g_free handles \c NULL just fine. Then + the passed in value is duplicated using \c g_strdup(). +*/ +const gchar * +ParamRadioButton::set (const gchar * in, SPDocument * doc, Inkscape::XML::Node * node) +{ + if (in == NULL) return NULL; /* Can't have NULL string */ + + if (_value != NULL) + g_free(_value); + _value = g_strdup(in); + + gchar * prefname = this->pref_name(); + prefs_set_string_attribute(PREF_DIR, prefname, _value); + g_free(prefname); + + return _value; +} + + +/** + \brief A function to get the current value of the parameter in a string form + \return A string with the 'value' as command line argument +*/ +Glib::ustring * +ParamRadioButton::string (void) +{ + Glib::ustring * param_string = new Glib::ustring(""); + + *param_string += "\""; + *param_string += _value; + *param_string += "\""; + + return param_string; +} + +/** \brief A special radiobutton class to use in ParamRadioButton */ +class ParamRadioButtonWdg : public Gtk::RadioButton { +private: + ParamRadioButton * _pref; + SPDocument * _doc; + Inkscape::XML::Node * _node; +public: + /** \brief Build a string preference for the given parameter + \param pref Where to put the radiobutton's string when it is selected. + */ + ParamRadioButtonWdg ( Gtk::RadioButtonGroup& group, const Glib::ustring& label, + ParamRadioButton * pref, SPDocument * doc, Inkscape::XML::Node * node ) : + Gtk::RadioButton(group, label), _pref(pref), _doc(doc), _node(node) { + add_changesignal(); + }; + ParamRadioButtonWdg ( const Glib::ustring& label, + ParamRadioButton * pref, SPDocument * doc, Inkscape::XML::Node * node ) : + Gtk::RadioButton(label), _pref(pref), _doc(doc), _node(node) { + add_changesignal(); + }; + void add_changesignal() { + this->signal_toggled().connect(sigc::mem_fun(this, &ParamRadioButtonWdg::changed)); + }; + void changed (void); +}; + +/** \brief Respond to the selected radiobutton changing + + This function responds to the radiobutton selection changing by grabbing the value + from the text box and putting it in the parameter. +*/ +void +ParamRadioButtonWdg::changed (void) +{ + if (this->get_active()) { + Glib::ustring data = this->get_label(); + g_message(data.c_str()); + _pref->set(data.c_str(), _doc, _node); + } +} + + + +/** + \brief Creates a combobox widget for an enumeration parameter +*/ +Gtk::Widget * +ParamRadioButton::get_widget (SPDocument * doc, Inkscape::XML::Node * node) +{ + Gtk::HBox * hbox = Gtk::manage(new Gtk::HBox(false, 4)); + Gtk::VBox * vbox = Gtk::manage(new Gtk::VBox(false, 0)); + + Gtk::Label * label = Gtk::manage(new Gtk::Label(_(_text), Gtk::ALIGN_LEFT, Gtk::ALIGN_TOP)); + label->show(); + hbox->pack_start(*label, false, false); + + // add choice strings as radiobuttons + // and select last selected option (_value) + bool first = true; + ParamRadioButtonWdg * radio; + Gtk::RadioButtonGroup group; + for (GSList * list = choices; list != NULL; list = g_slist_next(list)) { + Glib::ustring * text = reinterpret_cast(list->data); + if (first) { + radio = Gtk::manage(new ParamRadioButtonWdg(*text, this, doc, node)); + group = radio->get_group(); + first = false; + } else { + radio = Gtk::manage(new ParamRadioButtonWdg(group, *text, this, doc, node)); + } + radio->show(); + vbox->pack_start(*radio, true, true); + if (!strcmp(text->c_str(), _value)) { + radio->set_active(); + } + } + vbox->show(); + hbox->pack_end(*vbox, false, false); + hbox->show(); + + + return dynamic_cast(hbox); +} + + +} /* namespace Extension */ +} /* namespace Inkscape */ + -- cgit v1.2.3